Malicious PDF — malware analysis report

Static analysis result for SHA-256 2f415ffceb980ca7…

MALICIOUS

PDF

83.0 KB Created: 2021-05-23 01:03:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-24
MD5: 2e19858cf0c21da947593aea052c0c50 SHA-1: 78ec68937d1a906b0bc806d00e82053ab49afb87 SHA-256: 2f415ffceb980ca7412724798b69ed104dcdcef8f28d77578ca72192120c81b4
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF file was flagged by multiple heuristics, including ClamAV and an ML classifier, indicating malicious content. It contains numerous external links, with one pointing to a suspicious URL that appears to be part of a link farm designed to distribute malicious content or phish users. The presence of embedded URLs and the overall structure suggest an attempt to redirect users to potentially harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • External URI info PDF_URI
    PDF contains an external URL action
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://pelibifir.ru/strik?utm_term=inter+1st+year+botany+textbook+pdf+ap PDF link annotation
    • https://komuwewolidixat.weebly.com/uploads/1/3/4/8/134871085/kimikubowulunopesima.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4494433/normal_6026a846b4c7c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4449605/normal_5fe8b65769369.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4420915/normal_5fce7929d2ab0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4473616/normal_5fe77c2a67dff.pdfIn PDF document text
    • https://tojumemi.weebly.com/uploads/1/3/1/3/131379390/0ea3b1c7316dc2.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4453889/normal_5fc5b1fd66e12.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4451565/normal_603a6da6035cc.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4484635/normal_606df3fa44037.pdfIn PDF document text
    • https://moxitason.weebly.com/uploads/1/3/4/3/134384587/afc35bf45eb14af.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4389816/normal_604912b3720f6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366364/normal_6011d41b3ec48.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4497666/normal_605015212cee9.pdfIn PDF document text
    • https://bulabameworiw.weebly.com/uploads/1/3/4/0/134096114/760d98.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/b5ece577-caf0-4de1-ad5e-7f3ef7168dd1/my_friend_dahmer_movie_trailer.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3e4f8cd3-6095-4959-bcb0-a4e64a0385b0/54200220719.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b35b5174-c70b-4c03-b225-4b88692ded59/charisma_on_command_book_list.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b1c4a428-5a24-4868-b8ef-fd42e7e5534d/grand_power_exercise_bike_user_manual.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e34b20ab-a88f-42e4-87e1-47e1f7391b65/bosupolefi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/800c47e5-a4be-4e2a-908b-1702b1678232/24381388045.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c60a6264-67e8-48a3-9311-1087160c0962/bedevosojebosimazufa.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000104ea.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x104EA 5364 bytes
SHA-256: b1306278602511d896b5f87b362e03f19049679a4215c4ed290edd5bf93785da
font_01_sfnt_off00011749.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11749 11580 bytes
SHA-256: 90a4dd379693e92504aab96d208c22d581e2d0817db23441cefd45ca1a449548

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